document.oncontextmenu   	=   function(){return   false}; // contextmenü verbieten
  document.onselectstart   	=   function(){return   false}; // markieren verbieten
  document.oncopy   		    =   function(){return   false}; // kopieren verbieten
  document.oncut   			    =   function(){return   false}; // ausschneiden verbieten
  document.ondrag   		    =   function(){return   false}; // verschieben verbieten
  document.onhelp           =   function(){return   false}; // F1 hilfe unterdrücken

  /**
   *
   * @access public
   * @return void
   **/
  function showInhalt(id){
    document.getElementById('txt1_'+id).style.display = 'none';
    document.getElementById('txt2_'+id).style.display = 'block';
    document.getElementById('inhalt_'+id).innerHTML = '[ <a href="javascript: showInformation(\''+id+'\');">Information</a> ]';
  }

  function showInformation(id){
    document.getElementById('txt1_'+id).style.display = 'block';
    document.getElementById('txt2_'+id).style.display = 'none';
    document.getElementById('inhalt_'+id).innerHTML = '[ <a href="javascript: showInhalt(\''+id+'\');">Inhalte</a> ]';
  }

  function frau(){
    document.getElementById('fraubild1').style.backgroundImage='url(style/images/frau'+zufallszahl(1)+'.jpg)';
    return true;
  }


  /**
   *
   * @access public
   * @return void
   **/
  function bildwechsel(){
    document.getElementById('bildwechselbild2').style.backgroundImage='url(style/images/bildwechsel/'+zufallszahl(10)+'.jpg)';
  }

  function slideshow(){
    setTimeout(function(){fade('bildwechselbild2');},100);
    setTimeout(function(){bildwechsel();},200);
    setTimeout(function(){fade('bildwechselbild2');},4000);

    setTimeout("slideshow()",5000);
  }



  function zufallszahl(max){
    zahl = max - 1;
    a = 1 + zahl*(Math.random());
    a = Math.round(a);
    return a;
  }


  window.onload = function() {
    for(i=1; i<10; i++) {
      document.getElementById('bildwechselbild1').style.backgroundImage='url(style/images/bildwechsel/'+i+'.jpg)';
    }
    slideshow();
    frau();
  }

  var TimeToFade = 1000.0;


function fade(eid)
{
  var element = document.getElementById(eid);
  if(element == null)
    return;

  if(element.FadeState == null)
  {
    if(element.style.opacity == null
        || element.style.opacity == ''
        || element.style.opacity == '0.8')
    {
      element.FadeState = -2;
    }
    else
    {
      element.FadeState = 2;
    }
  }

  if(element.FadeState == 1 || element.FadeState == -1)
  {
    element.FadeState = element.FadeState == 1 ? -1 : 1;
    element.FadeTimeLeft = TimeToFade - element.FadeTimeLeft;
  }
  else
  {
    element.FadeState = element.FadeState == 2 ? -1 : 1;
    element.FadeTimeLeft = TimeToFade;
    element.style.display = element.FadeState == 2
        ? 'none' : 'block';
    setTimeout("animateFade(" + new Date().getTime()
        + ",'" + eid + "')", 33);
  }
}

function animateFade(lastTick, eid)
{
  var curTick = new Date().getTime();
  var elapsedTicks = curTick - lastTick;

  var element = document.getElementById(eid);

  if(element.FadeTimeLeft <= elapsedTicks)
  {
    element.style.display = element.FadeState == 1
        ? 'block' : 'none';
    element.style.opacity = element.FadeState == 1
        ? '.85' : '0';
    element.style.filter = 'alpha(opacity = '
        + (element.FadeState == 1 ? '85' : '0') + ')';
    element.FadeState = element.FadeState == 1 ? 2 : -2;
    return;
  }

  element.FadeTimeLeft -= elapsedTicks;
  var newOpVal = element.FadeTimeLeft/TimeToFade;
  if(element.FadeState == 1)
    newOpVal = 1 - newOpVal;

  newOpVal = newOpVal*0.85;
  element.style.opacity = newOpVal;
  element.style.filter =
      'alpha(opacity = ' + (newOpVal*100) + ')';

  setTimeout("animateFade(" + curTick
      + ",'" + eid + "')", 33);
}